Hello everybody, i need to manage file uploads with a new rails application. I proceded as i did with rails2 - declared the form as multipart <%= form_for(@photo, :html => {:multipart => true}) do |f| %> - and added the file_field tag <%= f.label :uploaded_data %><br /> <%= f.file_field :uploaded_data %> the form shows up correctly, but after submit i receive an error: 500 Internal Server Error If you are the administrator of this website, then please read this web application''s log file and/or the web server''s log file to find out what went wrong. in the server log i get this: TypeError (can''t convert nil into Integer): the controller is still the one produced by the "rails scaffold", so it should work fine (obviously i don''t expect it to really save the file). What am i missing? Using: ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.4.0] rails --version Rails 3.0.0 -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.